摘要
对湖南、湖北砖茶主产区具有代表性的55个茶园165个土样进行了水溶性氟，全氟及pH，有机质和交换性阳离子的测定。同时也测定了上述茶园的茶样水溶性氟。结果表明，湖南、湖北砖茶主产区土壤全氟含量略低于全国水平(440μg/g），但明显高于世界水平（200μg/g）。从土层来看，土壤含量0－5cm土层最高，0－20cm土层次之，20－40cm土层较低。氟在茶树体内具有较强的累积作用，且茶叶中氟含量与叶子的成熟度有密切关系，茶叶成熟度越高，氟含量越高。土壤中水溶性氟与pH值呈极显著正相关，与有机质呈极显著负相关，与交换性铝，锰呈极显著负相关，与交换性钾，钙，镁，有效态磷呈极显著正相关，与交换性钠呈显著正相关。
The water soluble F, total F content, soil pH, organic matter contents and exchangeable cation contents of tea garden soils and the corresponding tea samples in brick tea areas of Hunan, Hubei provinces were determined. The results showed that the total F content of soils was a bit lower than the average F level of China(440 μg/g), and obviously higher than the F level in the world(200 μg/g). The soil F content is highest in 0~5 cm depth, relatively low in 0~20 cm depth, lowest in 20~40 cm depth. F could be accumulated within tea plant, so the F content of tea is correlated to leaf maturity, the older the leaves are, the higher the fluorine content is. The high positive correlation was found between the water soluble F content and pH, the exchangeable K、Ca、Mg、Na content, the available P; the high negative correlation was between the water soluble F and the organic matter, the exchangeable Al 、Mn contents.
出处
《茶叶科学》
CAS
CSCD
北大核心
2002年第1期34-37,共4页
Journal of Tea Science
基金
国家科技部重点项目(k2000-05-02)内容之一
